Dust-guard.



Y. WILLIAMS.

DUST GUARD..

Patented Oct. 14, 1919.

awe-mung LACEY Y. WILLIAMS, OF TOLEDO, OHIO.

DUST-GUARD.

Specification of Letters Patent.

Patented Oct. 1a, 1919.

Application filed February 20, 1918. Serial No. 218,318.

To all whom it may concern:

Be it known that I, LAGEY Y. WVILLIAMS, a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Dust-Guards, of which the following is a specification.

The invention relates to dust guards of a well known proposed type, such as are comprised of two pieces one of which is of a general U shape with parallel arms and a semicircular bearing surface or edge between the arms to fithalf of a journal, and the other piece having a complemental semicircular bearing surface to fit the other half of a journal and slidably located between the arms of the first mentioned piece, spring means being provided for forcing the said parts together against the bearing surface of the journal.

Such guards heretofore designed have had the main pieces made of wood of a singleply or thickness, and all when placed in use have been failures, owing to the fact that the wood broke or warped and split, rendering the guard inoperative to exclude dust and dirt from the journal box. Even when corrugated pieces of metal or wooden strips were inserted in the single-ply of wood material or reinforcing bars secured to the ends and sides, the breaking and warping and splitting were not prevented and the separated split parts consequently became displaced sufficiently to form openings between the bearing edge of the guard and the ournal through which openlngs dirt could pass to the interior of the box.

No one of this type of guard has ever been used except experimentally and all have been failures.

I have succeeded in curing the imperfections appertaining to this species or type of guard asheretofore constructed by making each of the two parts of a plurality of layers or sheets of wood, three in number, one of the layers, preferably the central one, having the grain of the wood disposed at an angle to the grain or' grains of the other layers and gluing or cementing and riveting the sheets together. When the parts are thus fashioned and united I have found that oil or water soaking into the wood does not cause warping or splitting and the separation of the parts, and the strength of the narrow arms is increased so they will not break or become distorted.

A further imperfection of the type of guard mentioned is the separation of the arms leaving open spaces between the same and the movable or sliding section.

conformable to the above exposition, my improvements consist in making the general type of guard above mentioned of sections or parts each of three layers of wood, with the grains thereof angularly disposed, glued or cemented and riveted together, and-locating within the meeting edges of the arms and the movable section or part holding and spring mechanisms which not only will cause the frictional engagement of the bearing edge of the guard with the journal, but also hold the parts in line and prevent openings between the adjacent edges of the arms and the movable section.

The accompanying drawing illustrates an example of the embodiment of my invented improvements constructed and the parts combined according to the best mode of procedure I have so far devised for the purpose.

Figure. 1 is a view? in perspective of the guard, showing the parts made of three-ply wood material glued and riveted together.

Fig. 2 is an enlarged section adjacent one arm with parts broken away to disclose the location of one of the holding and spring mechanisms.

Fig. 3 shows one of the s ring mechanisms withthe parts separated? Fig. 4: is a section of Fig. 1 on line 44-.

The guard is comprised of two complemental sections A, B and two holdingand spring mechanisms C, C.

- The section A is of a general'U shape hay ing-arms 1, 1, a semicircular bearing surpressure, the grain of the central layer being angularly disposed relative to the grain of the other two layers, and the layers further held in place by rivets 8 passing through all the layers or sheets. Should oil or water cause a slight warping or separation of the layers, the rivets prevent an extension or spreading of the same.

Each arm and the adjacent edge of part B have a small portion of the central layers 6 out out to receive a holding and spring mechanism C.

Each mechanism cOmprises two similar '5 casings 9, 9 preferably formed by striking up in dies pieces of sheet metal, each casing having a flange 10 with a thin portion 11 through which a nail 12 can be driven, top and bottom perforated flanges or ears 18, 1013, and a recess 14C. 'The two casings are united/in slightly offset positions so the top ear of one casing, that in part B, overlaps the top ear of the opposite adjacent casing in an arml, At the bottom the ears over- 15 lap reversely. The spring 15 is located within the recesses 14, engaging at its opposite ends opposite earsof opposite casings, and awire nail 16 is passed through the per' forations in the ears of both casings and 20 through the spring,'and'the top end of the nail is I extended a suitable distance, as shown by Fig. 2.

Adjacent the proj the central layer 6 of the arm 1 is cut away at 17 and a recess 18 is provided in the central'sheet 6 of, part Bbelow the casing so as to allow the half of the casing in part B freely to travel upwardly when the sald part Bisiforce'doutwardly against spring press sure; and away from part A, as is necessary when the journal collar is passed through the dustguard opening in inserting or rev-; 'mov'ing a journal froma journal box.

' The two nails 12, 12 passed through the thin parts 11 of the flanges 10 of the casings and the wood adjacent hold the parts in lineand prevent the spreading of the arms. Thefholding and spring mechanisms are concealed and inclosed so dust and dirt can- 40 not enter to the relatively movable parts and render them inoperative.

My improvements provide a practical and operative guard of the type mentioned which will notw'a'rp or split'orbreak under nor- Copies 'of this patent may be obtained for ecting endof the nail -tion, each mechanism being located and in mal conditions of service, and one in which the two holding and spring mechanisms effectively perform the intended functions.

What Iclaim is:

1. The combination in a dust guard, of two sections having oppositely disposed com plemental curved edges and one section slid: able relative to the other, and spring mechanisms inclosed within recesses formed in the adjacent meeting edges ofthe sections and positively uniting them, each spring mechanismbeing comprised of a spring and two parts united to allow longitudinal move ment of one relative to the other against the pressure of the spring. 7

2. The combination in a, dust guard, of two sections one section having parallel arms of substantially the same length eX- tending in the same direction and a curved bearing edge between the arms, the other complemental section having a curved edge and slidably located between the arms of the" other section,and spring mechanisms for uniting and holding in line the edges of the arms and the edges of the complemental secclosed partly within a recess formed within 7 the inner edge of an arm and partly within the outer adjacent edge of the complemental section so as positively to connect the meeting edges and maintain the sections in the 7 5 same plane while allowing a sliding movement under spring pressure. 1

3,. Holding and spring mechanism for uniting two sections of a dust guard, comprising two'similar casings each having a flange, two perforated ears, and a recess for a spring, the sections united with the ears overlapping, a spring within the-recesses,

and a nail of greater length than the length of a casing loosely passed through the perforated ears and the spring.

In testimony-whereof I affix my signature .LAOEY Y. WILLIAMS.

fivelcentsleach, by addressing' the 'fflominissioner of-Patents, Washington, D. G. 

